TI-2026-81099 Aliases CVE-2026-117466 GHSA-vg7p-mchq-388x

Privilege escalation in Octopus Deploy Octopus Server to Administrator

LOW 39CWE-269Published 2026-10-27 · Updated 2026-11-04

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Privilege escalation
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

Octopus Deploy Octopus Server from 2019.0.0 before 2026.2.13469 and from 2026.3.0 before 2026.3.15863 is affected. Improper privilege management lets a user holding the System Manager role raise their own rights to full system Administrator. An authenticated remote attacker who holds the System Manager role can gain complete control over the server's confidentiality, integrity and availability (CWE-269).

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

In affected versions of Octopus Server, a user holding the System Manager role could escalate their privileges to full system Administrator.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00229 13th percentileScored 2026-11-07

Fix Fixed Octopus Server (Octopus Deploy): 2026.2.13469, 2026.3.15863

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Octopus Deploy	Octopus Server	2019.0.0 to before 2026.2.13469; 2026.3.0 to before 2026.3.15863	2026.2.13469, 2026.3.15863	Patch available	CNA

Octopus Server VendorOctopus Deploy Affected 2019.0.0 to before 2026.2.13469; 2026.3.0 to before 2026.3.15863 Fixed in 2026.2.13469, 2026.3.15863 Patch available CNA

Remediation

Upgrade Octopus Server to version 2026.2.13469 or 2026.3.15863 or later, depending on the release line in use. The sources list no vendor advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Fix · CNA Octopus Server (Octopus Deploy) Fixed in 2026.2.13469, 2026.3.15863

Timeline

2026-10-27 Threatist record created from CVE-2026-117466
2026-10-27 Alias added: GHSA-vg7p-mchq-388x
2026-10-28 Priority changed: MEDIUM → LOW
2026-11-04 CISA SSVC decision points changed

References

Other 1

https://advisories.octopus.com/post/2026/sa2026-17

TI-2018-13353 In Octopus Deploy 2018.8.0 through 2018.9.x before 2018.9.1, an authenticated user with… CVSS 3.0HIGH 8.8
TI-2022-02375 Improper authentication in Octopus Server CVSS 3.1CRITICAL 9.8
TI-2022-02579 Insufficient session expiration in Octopus Server CVSS 3.1CRITICAL 9.1
TI-2021-11816 Deserialization of untrusted data in Octopus Deploy Halibut CVSS 3.1CRITICAL 9.8
TI-2018-08066 In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the… CVSS 3.0CRITICAL 9.8
TI-2022-02575 In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes. CVSS 3.1CRITICAL 9.8

See all 117 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences